Improvement in door-springs



w. T. Rossum.

Door-Springs.

Patented Dec. 2,1873.

@ @i @www NTTED STATE-s PATENT FFICE.

WILLIAM T. ROSSITER, OF LINCOLN, NEBRASKA.

IMPROVEMENT IN DOOR-SPRINGS.

Specification forming part of Letters Patent No. 145,244, dated December 2, 1873; application filed August 16, 1873.

To all whom it may concern:

Be it known that I, WILLIAM T. RossITER., of Lincoln, in the county ot Lancaster and State of Nebraska, have invented a new and ing or post, and the other end to the door or gate, so as to operate by a twisting and untwisting action. It consists in a helical spring having a prismatic portion and a handle secured to one or both of its ends, in. combination with brackets, which are perforated to receive and hold the said prismatic portion or portions and handle or handles, as will be hereinafter explained.

In the accompanying drawings, A represents a door or gate, and B the door frame or post rIhe spring is applied diagonally across the joint, so as to operate by torsion or a twisting action in opening or shutting the door or gate. G represents the spring, which is ofthe helical kind, and into the ends of which prismatie plugs E are inserted, and secured to several of the coils by means of hooked clamps e", or in any other suitable manner. The plugs E extend beyond the ends of the spring, and are perfectly prismatic in shape. The plugs represented in the drawings are quadrangular in cross-section and slightly tapered, although in practice they may be polygonal or triangular. The plugs and spring are permanently and rigidly secured together, so that when the former are turnedthe spring will be coiled up or uncoiled, as the case may be. D D represent two brackets, one of which is secured to the part B, and the other to the part A,

which is hinged to it. .Each one of these brackets has a prismatic socket formed into it, corresponding to the shape of the eX- tended end of the plug E, so that when this extended end is received into its socket in the bracket it will be prevented from turning therein. There is also a slot, b, through each bracket D, through which passes a rod having a iiat portion on its end. This rod and tlat portion constitute a handle, which I have lettered a. The handle may be inserted into or formed on each plug E, and its stem may be of any desired length.

To operate my spring, the handlea is grasped and the spring compressed endwise until the prism atic extension of a plug, E, is freed from its bracket D, after which the spring can be turned to the right or left any number of times, and the plug extension returned into its socket, when the spring will act in accordance with the adjustment.

By thus forming handles d on the plug E, l render unnecessary the use of separate wrenches or cranks, and always have at hand the means by which the spring can be adjusted.

I have represented a plug and a handle apted brackets D D, or either of them, substan tially as described.-

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM T. ROSSITER.

Witnesses:

S. M. BOYD, J. H. BROWN. 

